This year, many new ESP32 boards appeared on the market. Today I will review ten different boards which have a battery connection, but no display. All results are assembled in a comparison table, but maybe you watch the video for my explanations which might help you to understand the consequences of a particular choice, or at least to assess if you can trust my findings.
As usual, I found significant differences between the boards which can influence your buying decisions.

These are the contenders:
- The WMOS with a 18650 battery holder
- The LOLIN32 Wemos board
- The long TTGO board
- The short TTGO Mini board with double pin rows
- The TTGO Pico board
- The LOLIN32 Pro Python board. I replaced Python fir this test
- The Lolin Lite board
- The Higrow flower sensor board
- The Wemos Pro board
- The FireBeetle board
- And the Bare ESP on a PCB as a comparison for current consumption

These are the criteria:
- Does the board use a shielded module or just a chip soldered on the PCB?
- How many pins are broken out to pin headers?
- Does the board come with an antenna connector for an external antenna?
- Is the board breadboard friendly?
- How clear is the pin labeling?
- Does the board have an additional “flash” button?
- Is a battery switch available?
- Which battery connector do you need?
- Does the board crash if you disconnect USB?
- What type of voltage regulator and LiPo management chips are used?
- How much current does the board consume?

Links:
Comparison Table: https://docs.google.com/spreadsheets/...
WMOS /18650: http://s.click.aliexpress.com/e/bUZrVF2
LOLIN32/Wemos: http://s.click.aliexpress.com/e/aAAuZ7e
TTGO http://s.click.aliexpress.com/e/EUrFMjA
TTGO Mini http://s.click.aliexpress.com/e/niUJieY
TTGO Pico https://www.aliexpress.com/item/TTGO-...
LOLIN32 Pro Python https://www.aliexpress.com/item/LOLIN...
Lolin Lite https://www.aliexpress.com/item/WEMOS...
Higrow https://www.aliexpress.com/item/higro...
Wemos Pro http://s.click.aliexpress.com/e/UNvJEAm
FireBeetle https://www.dfrobot.com/product-1590....

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Supporting Material and Blog Page: http://www.sensorsiot.org
Github: https://www.github.com/sensorsiot

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